Compilare: user.cpp: In function ‘int main()’: user.cpp:38:12: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (v[i].y > R) ^ user.cpp:29:28: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int L = a, R = v[1].y, ok = 1, nr = 1; ^ user.cpp:18:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dunarea.in", "r", stdin); ^ user.cpp:19:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dunarea.out", "w", stdout); ^ user.cpp:21:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &a, &b, &n); ^ user.cpp:24:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &tempx, &tempy); ^